<?php
echo '<pre>';
$email = array (
  10 => 'hello1@gmail.com',
  9 => '" hello2@gmail.com "',
  11 => 'hello2@gmail.com',
  'apple' => 'hello3@gmail.com',
  22 => '',
  3 => 'hello4@gmail.com',
  'one' => '" hello5@gmail.com "',
  44 => '0',
  5 => 'hello6@gmail.com',
  5 => false,
  'windows' => 'hello7@gmail.com',
  6 => null,
  666 => 'hello7@gmail.com',
);
$email = array_map('removeQuotes',$email);
$email = array_unique($email);
$email = array_filter($email);
$email = array_values($email);

var_export($email);
///var_export(array_filter(array_unique(array_values($email))));

function removeQuotes($val)
{
  return trim($val,' "');
}
